This is a Avalanche blockchain faucet service that allows users to request test tokens for various EVM-compatible networks and subnets. The application consists of a Node.js/Express.js backend with a React.js frontend. It implements sophisticated rate limiting (global, IP-based, wallet-based, and common token disbursal), captcha verification (reCAPTCHA v2/v3), and a pipeline check system requiring either mainnet balance validation or coupon redemption for token requests. The service supports multiple EVM chains and ERC20 tokens, with automatic nonce and balance management, transaction queuing, and mempool limit handling. Key architectural features include modular middleware, decoupled services for coupon and mainnet checking, and clean separation between blockchain interaction logic and API handling.